Title:
回路遮断器用トリップ制御回路
Document Type and Number:
Japanese Patent JP6392928
Kind Code:
B2
Abstract:
The present invention provides a trip control circuit for a circuit breaker capable of breaking a circuit when a fault current occurs due to a DC current component, as well as an AC current. The trip control circuit comprises a current transformer that has a core allowing a circuit to pass through and a secondary coil for detecting a current flowing on the circuit and providing a current detection signal; an oscillation circuit section that configured to apply an electrical signal to the secondary coil to increase a slope of a hysteresis loop of the current transformer to allow the secondary coil to detect a DC current and an AC current; and a trip determining circuit section that configured to compare a current value indicated by the current detection signal with a predetermined reference current value.
Inventors:
Song Jeon Kuk
Application Number:
JP2017089811A
Publication Date:
September 19, 2018
Filing Date:
April 28, 2017
Export Citation:
Assignee:
LSIS CO.,LTD.
International Classes:
H01H83/02
Domestic Patent References:
| JP2013038047A | ||||
| JP2013178205A | ||||
| JP3191870A | ||||
| JP2011182536A | ||||
| JP2012125053A |
Attorney, Agent or Firm:
Atsushi Aoki
Jun Tsuruta
Tomohiro Minamiyama
Akira Kawai
Kenichi Nakamura
Yuya Kuroda
Jun Tsuruta
Tomohiro Minamiyama
Akira Kawai
Kenichi Nakamura
Yuya Kuroda
Previous Patent: 情報処理装置及びプログラム
Next Patent: PRODUCTION OF LIQUID CRYSTAL DISPLAY PANEL PROVIDED WITH THIN FILM TRANSISTOR
Next Patent: PRODUCTION OF LIQUID CRYSTAL DISPLAY PANEL PROVIDED WITH THIN FILM TRANSISTOR